I don't know about them specifically, how active how much moving arount the tank they would do.
I have had crayfish. We did a project where we had a natural habitat of found items for our local park. We had a catfish, several crayfish, several minnow and guppy type fish, tadpoles, and if it was alive the kids caught it and put it in.
We ended up getting rid of half of the crayfish right away because they were in too much competition for food and were eating too many little fish. Things were better with three. As they got larger we put them back in the creek, kept one for the full year. He ate fish from mid tank.
Check on some actual experiences from others, maybe post a new thread for CPO compatibility with other fish.
The Cories concern me. They are so everywhere they maybe wouldn't respect HIS territory if they are indeed territorial.
If you decided to keep CPO, you would need to accept the possibility of him eating/killing some of the tank occupants, and not put a $50. trio in there!
I will try and post if I find out anything else which could help.
Do you already have Bamboo shrimp? I love mine, and friendly no "deadly" potential! lol
Our little 1" catfish was the only one we kept and he turned into a nearly one foot long fish eating monster!